/*
 * Copyright 2022 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package androidx.wear.compose.materialcore

import androidx.annotation.RestrictTo
import androidx.compose.foundation.BorderStroke
import androidx.compose.foundation.background
import androidx.compose.foundation.border
import androidx.compose.foundation.clickable
import androidx.compose.foundation.interaction.Interaction
import androidx.compose.foundation.interaction.MutableInteractionSource
import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.BoxScope
import androidx.compose.foundation.layout.size
import androidx.compose.material.ripple.rememberRipple
import androidx.compose.runtime.Composable
import androidx.compose.runtime.State
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.Shape
import androidx.compose.ui.semantics.Role
import androidx.compose.ui.semantics.role
import androidx.compose.ui.semantics.semantics
import androidx.compose.ui.unit.Dp

/**
 * Wear Material [Button] that offers a single slot to take any content (text, icon or image).
 *
 * [Button] can be enabled or disabled. A disabled button will not respond to click events.
 *
 * For more information, see the
 * [Buttons](https://developer.android.com/training/wearables/components/buttons)
 * guide.
 *
 * @param onClick Will be called when the user clicks the button.
 * @param modifier Modifier to be applied to the button.
 * @param enabled Controls the enabled state of the button. When `false`, this button will not
 * be clickable.
 * @param backgroundColor Resolves the background for this button in different states.
 * @param interactionSource The [MutableInteractionSource] representing the stream of
 * [Interaction]s for this Button. You can create and pass in your own remembered
 * [MutableInteractionSource] if you want to observe [Interaction]s and customize the
 * appearance / behavior of this Button in different [Interaction]s.
 * @param shape Defines the button's shape.
 * @param border Resolves the border for this button in different states.
 * @param buttonSize The default size of the button unless overridden by Modifier.size.
 * @param content The content displayed on the [Button] such as text, icon or image.
 */
@RestrictTo(RestrictTo.Scope.LIBRARY_GROUP)
@Composable
fun Button(
    onClick: () -> Unit,
    modifier: Modifier,
    enabled: Boolean,
    backgroundColor: @Composable (enabled: Boolean) -> State<Color>,
    interactionSource: MutableInteractionSource,
    shape: Shape,
    border: @Composable (enabled: Boolean) -> State<BorderStroke?>?,
    buttonSize: Dp,
    content: @Composable BoxScope.() -> Unit,
) {
    val borderStroke = border(enabled)?.value
    Box(
        contentAlignment = Alignment.Center,
        modifier = modifier
            .semantics { role = Role.Button }
            .size(buttonSize)
            .clip(shape) // Clip for the touch area (e.g. for Ripple).
            .clickable(
                onClick = onClick,
                enabled = enabled,
                interactionSource = interactionSource,
                indication = rememberRipple(),
            )
            .then(
                if (borderStroke != null) Modifier.border(border = borderStroke, shape = shape)
                else Modifier
            )
            .background(
                color = backgroundColor(enabled).value,
                shape = shape
            ),
        content = content
    )
}
